Quang Ninh, Feb. 28 -- Total trade revenue through the Mong Cai International Border Gate in the northern province of Quang Ninh topped 624 million USD as of the end of February, a year-on-year surge of 58.23%, according to head of the border gate management board Tran Bich Ngoc. Export value accounted for 424 million USD, while imports totaled more than 200 million USD. The border gate saw increased business activities with 578 enterprises undergoing customs procedures, of them 178 local, representing a rise of 114 firms compared to the same period last year, with 91 newly registered businesses. More than 300,000 tonnes of goods were traded through its border gates and crossing points through late February, a 56.4% increase from the corr...